(3aR,4R,9aS,9bR)-6,9-dimethyl-3-methylene-2,7-dioxo-2,3,3a,4,5,7,9a,9b-octahydroazuleno[4,5-b]furan-4-yl rel-2-methylacrylate 2-Methyl-acrylic acid 6,9-dimethyl-3-methylene-2,7-dioxo-2,3,3a,4,5,7,9a,9b-octahydro-azuleno[4,5-b]furan-4-yl ester 2-One-8beta-methacryloyloxy-guaia-1(10),3,11(13)-trien-6alpha,12-olide 2-propenoic acid, 2-methyl-, (3aR,4R,9aS,9bR)-2,3,3a,4,5,7,9a,9b-octahydro-6,9-dimethyl-3-methylene-2,7-dioxoazuleno[4,5-b]furan-4-yl ester InChI=1/C19H20O5/c1-8(2)18(21)23-13-7-10(4)14-12(20)6-9(3)15(14)17-16(13)11(5)19(22)24-17/h6,13,15-17H,1,5,7H2,2-4H3/t13-,15+,16-,17-/m1/s